Isolation shield system, insolation shield and method

ABSTRACT

The present invention relates to an insolation shield ( 3 ) which is arranged to be placed in connection with a building ( 1 ) to suppress solar radiation incident on the building. The insolation shield ( 3 ) comprises at least one shield element ( 8 ). At least one shield element ( 8 ) of the insolation shield ( 3 ) comprises at least one solar energy converter ( 4 ) to conduct incident solar energy to a target of consumption and/or storage. The insolation shield also comprises at least one control means ( 10 ) which is arranged to control the position of said at least one shield element ( 8 ) on the basis-of the direction of-incident beams on the control element ( 10 ).

[0001] The present invention relates to an insolation shield systemcomprising at least one shield element which is arranged to be placed inconnection with a building to suppress solar radiation on the building.The invention also relates to an insolation shield comprising at leastone shield element which is arranged to be placed in connection with abuilding to suppress solar radiation incident on the building.Furthermore, the invention relates to a method for suppressing solarradiation incident on a building by means of at least one insolationshield comprising at least one shield element, and in which method theinsolation shield is placed in connection with the building.

[0002] Venetian blinds are known to be used as insolation shields tosuppress solar radiation in a room. These Venetian blinds are normallyfixed in the interspace between window panes in such a way that theposition of the laths of the Venetian blinds can be adjusted to achievethe necessary suppression of radiation. Furthermore, these laths can belifted up, if necessary, almost completely from the front of the window.

[0003] Also, Venetian blinds have been manufactured which are fixedabove a window in a room. Thus, it will not be necessary to drill holesin the window frame for the adjustment of the Venetian blind. In such asolution, the warming up of the room caused by solar radiation isstronger than in the solution in which the Venetian blinds are placed inthe window interspace. In both of these solutions, it is possible toachieve substantially equal attenuation of light emitted by the sun.

[0004] Recently, buildings have been constructed, in which theinsolation shields are placed outside the building, for example in frontof or above the windows. With this arrangement, it is possible to reduceunnecessary warming up of the building by the effect of solar radiation.Particularly in such buildings, in which a large part of the facade isformed by glass, this kind of a solution is useful in the warm season.The outer wall is provided with fastening means for fastening theinsolation shields. Furthermore, when using insolation shields with thefacility of adjustment, the necessary adjusting mechanisms must beprovided so that the suitable adjusting position can be set each time,preferably from the room.

[0005] Consequently, insolation shields according to prior art are usedto suppress solar radiation, primarily light and during the warm seasonalso thermal radiation, entering the rooms of a building.

[0006] Solar energy converters are known, which can be used to convertsolar light energy to electrical energy, or to recover thermal energye.g. in a heating fluid. However, a problem in such solutions is, forexample, that the solar energy converters are not necessarily in themost advantageous position in relation to the direction of solarradiation, because the sun moves during the day. Thus, the efficiency isnot the best possible. This situation can be improved by manuallyadjusting the position of the solar energy converters, but this may bedifficult and, on the other hand, it is easily neglected.

[0007] Now, the purpose of the present invention is to provide aninsolation shield, in which the aim is, in addition to the effect ofsuppressing solar radiation, to utilize the energy contained in solarradiation in a more effective way than in the solutions of prior art.The invention is based on the idea that the insolation shield isequipped with at least one adjusting means for adjusting the directionof the shield elements (laths) on the basis of the position of the sun.This energy can be stored or conducted directly to a target ofconsumption. To put it more precisely, the insolation shield systemaccording to the present invention is primarily characterized in that atleast one shield element of the insolation shield system comprises atleast one solar energy converter for conducting the solar energy focusedon it to a target of consumption and/or storage, and that the insolationshield system comprises at least one adjusting means with means formeasuring the intensity of solar radiation to determine the direction ofincidence of sunbeams, wherein the position of at least one shieldelement is arranged to be adjusted on-the basis of the direction ofincidence of the sunbeams on the control element. The insolation shieldaccording to the present invention is primarily characterized in that atleast one shield element of the insolation shield comprises at least onesolar energy converter for conducting the solar energy incident on it toa target of consumption and/or storage, and that the insolation shieldcomprises at least one adjusting means with means for measuring theintensity of solar radiation to determine the direction of incidence ofsunbeams, wherein the position of at least one shield element isarranged to be adjusted on the basis of the direction of incidence ofthe sun beams on the adjusting element. Furthermore, the methodaccording to the invention is primarily characterized in that at leastone shield element of the insolation shield comprises at least one solarenergy converter, wherein solar energy incident on the solar energyconverter is conducted to a target of consumption and/or storage, andthat at least one adjusting means is used for measuring the intensity ofsolar energy to determine the direction of incidence of sunbeams,wherein the position of said at least one shield element is adjusted onthe basis of the direction of incidence of the sunbeams.

[0008] Considerable advantages are achieved with the present inventionwhen compared with insolation shields of prior art. With the insolationshield according to the invention, it is possible to utilize solarenergy incident on the insolation shield more efficiently e.g. in theair conditioning, heating and/or illumination of a room. According tothe solution of the invention, when the sun is shining, the position ofthe solar energy converters is as advantageous as possible in relationto the position of the sun, wherein solar energy is recovered by thesolar energy converters in the form of thermal energy and/or electricalenergy in a more effecient way than in the form of solar energy. Theadjustment of the position of the shield elements according to thedirection of incidence of the sunbeams has also the advantage that thelight-protecting effect of the shield elements is the best possible, inspite of the movement of the sun. Moreover, there is no need for manualadjustment, wherein the-use is more convenient than the use of solutionsof prior art. If necessary, solar energy can also be stored either asthermal energy or by converting it to electrical energy which can beused to charge batteries. In the use of insolation shield panelsaccording to the invention, separate solar panels or solar cells willnot be necessary, wherein it is possible to save construction costs.Furthermore; the electric energy generated in the solar panels can beutilized particularly in improving the air conditioning and in thelighting of rooms. Thus, it is possible to design the air conditioningof the building to be of lower capacity and, particularly in the warmseason, to take the energy needed for additional air conditioning, fromthe insolation shields. The insolation shields according to theinvention can be arranged to be controllable so that even though thequantity of solar radiation is adjusted in the room, this will not havea significant effect on the quantity of energy produced by theinsolation shield. Insolation shields according to the invention canalso be made suitable for retrofitting, wherein for example inconnection with repairings of buildings, it is possible to installinsolation shields of the invention or to replace existing insolationshields with insolation shields of the invention.

[0009] In the following, the invention will be described in more detailwith reference to the appended drawings, in which

[0010]FIG. 1 shows an insolation shield according to an advantageousembodiment of the invention, installed on the outer wall of a building,

[0011]FIG. 2 shows an insolation shield according to anotheradvantageous embodiment of the invention in a reduced view,

[0012]FIGS. 3a to 3 f show different control positions of insolationshields according to different embodiments of the invention,

[0013]FIGS. 4a and 4 b illustrate the operating principle of controllingthe insolation shield according to an advantageous embodiment of theinvention with a control means,

[0014]FIGS. 4c and 4 d illustrate the operating principle of controllingthe insolation shield according to another advantageous embodiment ofthe invention with a control means,

[0015]FIG. 4e illustrates a structure of a control means for theinsolation shield according to an advantageous embodiment of theinvention, and

[0016]FIG. 5 shows the structure of the control circuit for theinsolation shield according to a preferred embodiment of the inventionin a reduced block chart.

[0017]FIG. 1 shows a part of the facade of a building 1, in whichinsolation shields 3 according to an advantageous embodiment of theinvention are placed above windows 2. The insolation shields 3 compriseone or more shield elements 8 consisting of one or more solar energyconverters 4, such as solar cells. The facade is provided with bracketsor the like (not shown), to which the insolation shields 3 can befastened with fastening means in a way known as such so that theposition of the shield elements 8 of the insolation shields can bechanged, if necessary. The insolation shields 3 are installed so thatthe solar radiation entering a room is suppressed to such an extentwhich is necessary in each situation. Factors affecting this include,for example, the warmth of the climate in the region, such as theaverage temperature in the warm season. Furthermore, the orientation ofthe solar energy converter 4 towards the sun is taken into account inthe installation. This is easy to take into account particularly onwalls facing the south, but this orientation should be considered moreon walls facing the north, for the solar energy converter 4 to yield amaximum quantity of electrical energy.

[0018] We shall next describe the control operation of the insolationshield system according to an advantageous embodiment of the inventionparticularly with reference to FIGS. 4a and 4 b. The system comprisesone or more insolation shields 3 comprising one or more control means 8.Preferably, one shield element 8 is provided with a control means 10comprising a first measuring means 11 and a second measuring means 12.The measuring means 11, 12 are photosensitive means, such as lightdiodes, solar cells, or the like, which generate an electrical signalproportional to the luminous intensity. The control means 10 is fastenedto that planar surface of the shield element 8 which is to be orientedtowards the sun. The control means 10 is placed in a position, in whichthe measuring means 11, 12 are substantially perpendicular to the planarsurface of the shield element. Moreover, these measuring means 11, 12are preferably substantially parallel, but they can also be placeddiagonally so that the first measuring means 11, the second measuringmeans 12 and the planar surface of the shield element constitute anisosceles triangle whose sides are formed by the measuring means. Thisis illustrated in the appended FIG. 4e. In said case, in which themeasuring means 11, 12, are substantially parallel, the angle α issubstantially 90°.

[0019] The measuring means 11, 12 generate a signal, preferably avoltage, whose intensity is proportional to the intensity of lightincident on the surface of the measuring means 11, 12. The signalsgenerated by the first and second measuring means are conducted to thefirst 13 a and second 13 b inputs of a reference means 13, respectively.On the basis of the difference between these measuring signals, acontrol signal V is generated in the reference means 13 and is input ina motor 14 or the like. The motor 14 changes the position angle of theshield elements 8 of the insolation shield to reduce the differencebetween the measuring signals formed by the first 11 and second 12measuring means. The adjusting is iterated until the difference reachesa predetermined target value, preferably a minimum. Thus, the positionof the control means 10 is such that the intensity of light incident onthe surfaces of both measuring means 11, 12 is substantially equal. Inthe example situation of FIG. 4a, the intensity of solar radiation Aincident on the surface of the first measuring element 11 is higher thanthe intensity of solar radiation A on the surface of the secondmeasuring means 12, wherein the control signal V is used to control themotor 14 to turn the shield elements 8 in the direction indicated withan arrow S. In a corresponding manner, if the intensity of incidentlight on the surface of the second measuring means 12 is higher than theintensity of incident light on the surface of the first measuring means11, the control means 13 will generate a control signal which makes themotor rotate in the other direction, to turn the shield element in thedirection opposite to the direction of the arrow S. Although FIGS. 4aand 4 b show only one shield element 8 to be turned, it will be obviousthat there can also be more shield elements, wherein all of these arepreferably controlled by the same motor 14, by means of a control signalgenerated by a single control means 10. Consequently, a separate controlmeans 10 will not be needed for each shield element 8, but preferablyone control means 10 will be sufficient.

[0020] Each insolation shield 3 may comprise a separate motor or, withappropriate arrangements, in some applications a single motor can beused to adjust the position of the shield elements of two or moreinsolation shields 3. This can be exemplified by a system, in which abuilding is provided with insolation shields placed on one wall, inconnection with windows in the wall. The building may comprise severalstoreys. Thus, in some cases, it is possible to arrange one motor toadjust the shield elements 8 of the insolation shields 3 placed inconnection with windows of the same storey.

[0021] In practical applications, the signals generated by the first 11and second 12 measuring means are not necessarily equal, even though thesurfaces of both of the measuring means 11, 12 were exposed to the sameintensity of light. Thus, these differences can be compensated bymeasuring the signal difference and by correcting the control signal Vgenerated in the reference means 13 on the basis of this difference.Thus, said predeteremined target value is not a minimum value but thesignal difference in a situation of compensation. This correction oftolerance errors is prior art known by anyone skilled in the art,wherein it is not necessary to describe it in more detail in thiscontext.

[0022] Although it has been presented above that the control means isfastened to one shield element 8, it will be obvious that the inventionis not limited solely to such applications. The invention can also beapplied in such a way that the control means 10 is placed apart from thesolar energy converters, for example on the outer wall of the building.Thus, the signal generated by the control means 10 is transmitted to thereference means, as above, and the reference means 13 is used togenerate the control signal. This control signal V is conducted to oneor more motors 14 or corresponding means to adjust the position of theshield elements 8. In this embodiment, the control means 10 ispreferably used to adjust the position of shield elements 8 placed onthe same wall. Thus, it is possible to equip each such wall of thebuilding, on which adjustment is needed, with a control means 10 and touse this control means for adjusting the position of the shield elementsplaced on the same wall.

[0023] In the above-described embodiment, in which the control means 10is apart from the shield elements, the control means 10 can beimplemented to be turnable. Thus, the control means 10 is provided witha separate motor or corresponding means (not shown), by which theposition of the control means can be adjusted in relation to thedirection of incidence of sunbeams. Thus, signals generated by thecontrol means 10 are used to find such a position of the control means10 in which the intensity of incident light on the surfaces of both themeasuring means 11, 12 is substantially equal. According to thisposition, also the position of the shield elements 8 is adjusted so thatthey form a substantially right angle with the position of this controlmeans 10, as presented above in connection with the description of thefirst advantageous embodiment.

[0024] In this embodiment, the control means can also be fixed in astationary position on the wall of the building. Thus, a table or thelike can be drawn up of the signals of the measuring means 11, 12, tofind out, each time, the most advantageous position of the shieldelements in relation to the direction of incident sunbeams. This tableor the like can be drawn up, for example, empirically. Valuescorresponding to the ratio of signals from the first 11 and second 12measuring elements with different directions of incident sunbeams areplaced in the table. Using the signal ratio gives the advantage thatpossible changes, caused by impurities in the air, cloud layer, soilingof the surface of the measuring elements 11, 12, and aging of themeasuring elements 11, 12, in the values of the absolute measuringsignal (sensitivity=variations) do not substantially affect the controlfunctions. This fixed mounting has the advantage that there is no needto change the position of the control means 10, wherein the structurebecomes mechanically simpler and is less susceptible to damage.

[0025] We shall now describe the control operation of the insolationshield according to an advantageous embodiment of the inventionparticularly with reference to FIGS. 4c and 4 d. In this embodiment, theshield elements 8 are not turnable, but they are glidable and may bepartly rolled up by a revolving movement of a revolving means, such asthe motor 14, or the like. The control means 10, which also in thisembodiment comprises a first measuring means 11 and a second measuringmeans 12, is not directly fastened to the shield element 8 but inconnection with the revolving means. This revolving means is used toglide the shield element either up or down. The angle of rotation of thecontrol means 10 is proportional to the revolution of the revolvingmeans. In the arrangement according to FIGS. 4c and 4 d, when therevolving means revolves clockwise, the control means revolvescounterclockwise. Thus, the aim is that when the incident sunbeams arehigh, with a relatively sharp angle, less of the shield element 8 is infront of the window. Thus, the control means 10 may even be almostupright. In a corresponding manner, when the sun shines lower, theshield element 8 is shifted so that the surface of the shield element 8covering the window is larger. Thus, the control means 10 may even be inthe horizontal position, when the sun shines right above the horizon. Ifnecessary, the revolution of the control means 10 is arranged by meansof a transmission mechanism 15 (gearbox) to match with the revolution ofthe revolving means between the extreme positions.

[0026] If necessary, the control arrangement according to the inventioncan be switched off, for example for night time, wherein possible lightsources in the environment will not cause unnecessary control movements.Furthermore, if necessary, it is possible to arrange a substantiallyopaque shield (not shown) in the vicinity of the control means 10, toprevent the effect of possible reflections or strong artificial lightsources on the control function. Due to the relatively slow movement ofthe sun, the control function does not need to be continuous, but it canbe arranged to be intermittent. Thus, signals generated by the measuringelements 11, 12 of the control means 10 are conducted to the motor 14 orthe like at intervals of, for example 30 min, 45 min or an hour, toadjust the position of the shield elements 8, when necessary. The timingcan be performed, for example, by means of a timer 16 shown in FIG. 5.If such a timing is not needed, also a timer 16 is not necessarilyrequired.

[0027] Furthermore, the insolation shield 3 is provided with conductors,by means of which the electric energy produced by the solar energyconverter 4 can be conducted to a desired location, for example acurrent supply system (not shown) or a storage battery 5 (FIG. 2), inwhich the electric energy is stored. If a room-specific storage batteryis used, these electrical conductors are introduced, preferably throughthe wall, to the room in which the storage battery 5 is placed. Thestorage battery 5 is provided with the necessary control equipment 6 forcontrolling the charging and discharging of batteries in thestorage-battery 5. This is necessary to prevent the batteries of storagebattery 5 from being damaged by overvoltage or undervoltage. The storagebattery 5 can be used to drive, for example, a fan 7 for improving theair conditioning of the room. This is useful particularly in the warmseason, because solar radiation tends to warm the building and the roomsin it. This is taken into account in the design of the capacity of theair conditioning systems (not shown), to keep the temperature in therooms of the building at a comfortable level. When insolation shields 3according to the invention are used, the air conditioning can bedesigned to have a slightly lower cooling capacity, because theelectrical energy generated by the insolation shield 3 can be used toachieve the required additional cooling. The need for additional coolingis often the greatest when solar radiation is most intense, wherein alsothe electrical energy generated by the solar panels is at its highest.Furthermore, it is possible to reduce the consumption of electricalenergy supplied from the electrical network in the building, and therebyto reduce the consumption of fuel used for generating electricity andthe pollution load on the environment.

[0028] It is obvious that if which no storage battery 5 is used, theelectricity to be produced by the solar panels 4 will be conducteddirectly e.g. to a fan 7, but the extra energy generated by the solarenergy converter can thus not be stored. On the other hand, on a warmbut cloudy day, the electrical energy generated by the solar energyconverter may not necessarily be sufficient to provide the additionalair conditioning needed.

[0029]FIG. 2 shows an insolation shield 3 according to anotheradvantageous embodiment of the invention in a reduced perspective view.In this embodiment, the insolation shield comprises several shieldelements 8 consisting of solar panels 4. These shield elements 8 can bearranged to be adjustable preferably so that their angle in relation tothe frame 9 is changed. Thus, the angle can be changed according to theposition of the sun each time, to achieve as efficient suppression ofsolar radiation as possible. The control mechanisms used for theseshield elements 8 can be mechanisms known as such, wherein it will notbe necessary to describe them in more detail in this context.

[0030]FIGS. 3a to 3 f show some advantageous insolation shields whichare also provided with the control facility. FIGS. 3a, 3 b and 3 c showthe insolation shields 3 in a first position, in which solar radiationis suppressed. In a corresponding manner, FIGS. 3d, 3 e and 3 f show theinsolation shields 3 in a second control position, in which they do notsignificantly suppress solar radiation incident on a room. However,during times of daylight, these insolation shields generate electricalenergy also in this second control position.

[0031] In the insolation shields 3 according to the invention, it ispossible to use solar panels 4 known as such, fastened in a suitablesupport structure for installation. The insolation shields can also beimplemented as so-called lamellar blinds, in which at least part of thelamellae (not shown) comprise a solar energy converter, or the lamellaeconsist of solar panels. These lamellae are arranged to be turnable inrelation to the longitudinal axis, and they can be moved away from thefront of the window, if necessary. The insolation shields 3 according tothis embodiment are primarily intended to be placed on the side of theroom in the same way as lamella blinds of prior art.

[0032] The insolation shields 3 according to the invention can also beimplemented as Venetian blinds. Thus, the solar energy converters shouldbe relatively narrow, if the insolation shields 3 are intended to beplaced in the window interspace. When the insolation shields are placedoutside or inside a window, it is also possible to use wider shieldelements 8, if necessary.

[0033] The solar energy converters used in the above-presentedembodiments were solar panels for generating electric energy from solarenergy; however, in the insolation shield according to the invention, itis also possible to use so-called solar cells to generate thermal energyfrom solar energy. Thus, the energy conductors used are tubes or thelike which are filled with a flowing medium, such as a glycol-containingfluid. Thus, thermal energy can be transferred from the solar celleither directly to a target of consumption, such as for heating of aroom, or the thermal energy can be conducted to be stored, for example,in the soil, from which thermal energy can be conducted into the room,for example with a thermal pump, if necessary. The heat transfer fromthe flowing medium of the solar cell to the target of consumption orstorage can be implemented, for example, by a heat exchanger or byanother method known as such.

[0034] It is obvious that the present invention is not limited solely tothe above-presented embodiments but it can be modified within the scopeof the appended claims.

1. An insolation shield system (3) comprising at least one shieldelement (8) which is arranged to be placed in connection with a building(1) to suppress solar radiation incident on the building, at least oneshield element (8) of the insolation shield system (3) comprises atleast one solar energy converter (4) for conducting incident solarenergy to a target of consumption and/or storage, and that theinsolation shield system comprises at least one control means (10)provided with means (11, 12) for measuring the intensity of solarradiation to determine the direction of incident sunbeams, wherein theposition of said at least one shield element (8) is arranged to beadjusted on the basis of the direction of incident sunbeams on thecontrol element (10), characterized in that the first measuring means(11) and the second measuring means (12) are placed in a position, inwhich the surface of the first measuring means (11) is directed on adifferent direction than the surface of the second measuring means (12),the insolation shield system being without a separate shielding devicefor the first (11) and second measuring means (12), wherein the positionof the control element (10) is arranged to be amended so that thesurface of the first measuring means (11) and the surface of the secondmeasuring means (12) are at an angle α to the normal of the direction ofthe incident sunbeams.
 2. The insolation shield system according toclaim 1, characterized in that said means (11, 12) for measuring theintensity of solar radiation comprise a first (11) and a second (12)measuring means arranged to generate a signal proportional to theintensity of incident light on the measuring means (11, 12), and thatthe insolation shield system comprises means (13) for, generating adifference signal between the signal generated by the first measuringmeans (11) and the signal generated by the second measuring means (12),and means (14) for adjusting the position of said at least one shieldelement (8) on the basis of said difference signal.
 3. The insolationshield system according to claim 2, characterized in that the change inthe position of the shield element (8) is arranged to change theposition of said control element (10) in relation to the direction ofsunbeams incident on the control element (10).
 4. The insolation shieldsystem according to claim 3, characterized in that said control means(10) is fastened to one shield element (8), wherein the surface of thefirst measuring means (11) and the surface of the second measuring means(12) are at an angle α to the normal of the shield element (8).
 5. Theinsolation shield system according to claim 2, 3 or 4, characterized inthat the position of said at least one shield element (8) is arranged tobe adjusted to achieve the minimum value of said difference signal. 6.The insolation shield system according to claim 1, characterized in thatsaid control means (10) is fastened to the wall of the building.
 7. Theinsolation shield system according to claim 1, characterized in thatsaid control means (10) is placed on the roof of the building.
 8. Theinsolation shield system according to any of the claims 1 to 7,characterized in that said building comprises at least one room with awindow (2), and that said at least one shield element (8) is arranged tobe placed in connection with the window (2) of said room.
 9. Theinsolation shield system according to any of the claims 1 to 8,characterized in that the solar energy converter (4) comprises a solarenergy converter for generating electrical energy from solar energy. 10.The insolation shield system according to any of the claims 1 to 9,characterized in that the solar energy converter (4) comprises a solarcell for generating thermal energy from solar energy.
 11. Theinsolation-shield system according to any of the claims 1 to 10,characterized in that the shield elements (8) are arranged to berotatable in the direction of the longitudinal axis.
 12. The insolationshield system according to any of the claims 1 to 11, characterized inthat it is arranged to be fastened to the outer wall of the building(1).
 13. The insolation shield system according to any of the claims 1to 12, characterized in that the window comprises at least two paneswhich are placed at a distance from each other, and that the insolationshield is arranged to be placed between the two panes in the window (2).14. The insolation shield system according to any of the claims 1 to 13,characterized in that it is arranged to be placed in a room.
 15. Theinsolation shield system according to any of the claims 1 to 14,characterized in that the angle α is substantially 90°.
 16. Aninsolation shield (3) comprising at least one shield element (8) whichis arranged to be placed in connection with a building (1) to suppresssolar radiation incident on the building, at least one shield element(8) of the insolation shield (3) comprises at least one solar energyconverter (4) for conducting incident solar energy to a target ofconsumption and/or storage, and that the insolation shield comprises atleast one control means (10) provided with means (11, 12) for measuringthe intensity of solar radiation to determine the direction of incidentsunbeams, wherein the position of said at least one shield element (8)is arranged to be adjusted on the basis of the direction of sunbeamsincident on the control element (10), characterized in that the firstmeasuring means (11) and the second measuring means (12) are placed in aposition, in which the surface of the first measuring means (11) isdirected on a different direction than the surface of the secondmeasuring means (12), the insolation shield system being without aseparate shielding device for the first (11) and second measuring means(12), wherein the position of the control element (10) is arranged to beamended so that the surface of the first measuring means (11) and thesurface of the second measuring means (12) are at an angle α to thenormal of the direction of the incident sunbeams.
 17. The insolationshield according to claim 16, characterized in that said control means(10) is attached to one shield element (8).
 18. A method for suppressingincident solar radiation on a building by means of at least oneinsolation shield (3) comprising at least one shield element (8), and inwhich method the insolation shield (3) is placed in connection with abuilding (1), at least one shield element (8) of the insolation shield(3) comprises at least one solar energy converter (4), wherein solarenergy directed at the solar energy converter is conducted to a targetof consumption and/or storage, and the at least one control means (10)is used to measure the intensity of solar radiation to determining thedirection of incident sunbeams, wherein the position of said at leastone shield element (8) is adjusted on the basis of the direction ofincident sunbeams characterized in that the first measuring means (11)and the second measuring means (12) are placed in a position, in whichthe surface of the first measuring means (11) is directed on a differentdirection than the surface of the second measuring means (12), theinsolation shield system being without a separate shielding device forthe first (11) and second measuring means (12), wherein the position ofthe control element (10) is amended so that the surface of the firstmeasuring means (11) and the surface of the second measuring means (12)are at an angle α to the normal of the direction of the incidentsunbeams.